<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 添加角色对话框 -->
            <el-dialog title="添加角色" :visible.sync="addDialogVisible" @close="addDislogClosed">
                <el-form :model="addRolesForm" :rules="addFormRules" ref="addRolesForm" label-width="100px">
                    <el-form-item label="角色名称" prop="roleName">
                        <el-input v-model="addRolesForm.roleName"></el-input>
                    </el-form-item>
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="addRolesForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="addDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="addRolesUser">确 定</el-button>
                </span>
            </el-dialog>


            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                            v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                                    v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                                            {{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"
                                            closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>

                        <!-- <pre>
                {{scope.row}}
              </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">
                            编辑</el-button>
                        <el-button size="mini" type="danger" @click="rolesdelete(scope.row.id)" icon="el-icon-delete">删除
                        </el-button>
                        <el-button size="mini" @click="showSetRightDialog(scope.row)" type="warning"
                            icon="el-icon-search">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 编辑对话框 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="30%">
            <el-form :model="editRolesForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRolesForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRolesForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editFormInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
                :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                // 所有角色列表数据
                rolelist: [],
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                // 所有权限的数据
                rightslist: [],
                // 添加角色对话框的显示和隐藏
                addDialogVisible: false,
                // 编辑对话框的显示和隐藏
                editDialogVisible: false,
                //添加角色数据
                addRolesForm: {
                    roleName: '',
                    roleDesc: ''
                },
                
                //编辑角色数据
                editRolesForm: {},
                // 添加角色的验证规则对象
                addFormRules: {
                    roleName: [{
                            required: true,
                            message: '请输入角色名字',
                            trigger: 'blur'
                        },
                        {
                            min: 3,
                            max: 10,
                            message: '输入的范围是 3 ~ 10 为字符',
                            triggetr: 'nlur'
                        }
                    ],
                    roleDesc: [{
                            required: true,
                            message: '请输入角色描述',
                            trigger: 'blur'
                        },
                        {
                            min: 5,
                            max: 20,
                            message: '输入的范围是 5 ~ 20 为字符',
                            triggetr: 'nlur'
                        }
                    ]
                },
                // 编辑角色的验证规则对象
                editFormRules: {
                    roleName: [{
                            required: true,
                            message: '请输入角色名字',
                            trigger: 'blur'
                        },
                        {
                            min: 3,
                            max: 10,
                            message: '输入的范围是 3 ~ 10 为字符',
                            triggetr: 'nlur'
                        }
                    ],
                    roleDesc: [{
                            required: true,
                            message: '请输入角色描述',
                            trigger: 'blur'
                        },
                        {
                            min: 5,
                            max: 20,
                            message: '输入的范围是 5 ~ 20 为字符',
                            triggetr: 'nlur'
                        }
                    ]
                },
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认选中的节点Id值数组
                defKeys: [],
                // 当前即将分配权限的角色id
                roleId: ''
            }
        },
        created() {
            this.getRolesList()
        },
        methods: {
            // 获取所有角色的列表
            async getRolesList() {
                const {
                    data: res
                } = await this.$http.get('roles')

                if (res.meta.status !== 200) {
                    return this.$message.error('获取角色列表失败！')
                }

                this.rolelist = res.data

                console.log(this.rolelist)
            },
            // 添加角色
            addRolesUser() {
                this.$refs.addRolesForm.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.post('roles', this.addRolesForm)
                    console.log(res)
                    if (res.meta.status !== 201) {
                        return this.$message.error('添加角色失败!')
                    }
                    this.$message.success('添加角色成功!')
                    this.getRolesList()
                    this.addDialogVisible = false
                })
                // console.log(this.addRolesForm)
            },
            // 清空添加角色对话框
            addDislogClosed() {
                this.$refs.addRolesForm.resetFields()
            },
            // 删除角色
            async rolesdelete(id) {
                const confirmRusult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '删除角色', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
                // 没有使用await
                if (confirmRusult !== 'confirm') {
                    return this.$message.info('已取消该删除操作')
                }
                this.$http.delete('roles/' + id).then(res => {
                    const {
                        data: response
                    } = res
                    // console.log(response)
                    if (response.meta.status !== 200) {
                        return this.$message.error('该用户删除失败')
                    }
                    this.$message.success('该用户已经删除')
                    this.getRolesList()
                })
            },

            // 得到修改用户的信息
            async showEditDialog(id) {
                const {
                    data: res
                } = await this.$http.get('roles/' + id)
                if (res.meta.status !== 200) {
                    return this.$message.error('查询角色失败!')
                }
                this.editRolesForm = res.data
                console.log(this.editRolesForm)
                this.editDialogVisible = true
            },
            editFormInfo() {
                this.$refs.editFormRef.validate(valid => {
                    if (!valid) return
                    this.$http
                        .put('roles/' + this.editRolesForm.roleId, {
                            roleName: this.editRolesForm.roleName,
                            roleDesc: this.editRolesForm.roleDesc
                        })
                        .then(res => {
                            if (res.data.meta.status !== 200) {
                                return this.$message.error('修改角色失败!')
                            }
                            this.$message.success('修改角色成功!')
                            this.getRolesList()
                        })
                    this.editDialogVisible = false
                })
            },
            // 根据Id删除对应的权限
            async removeRightById(role, rightId) {
                // 弹框提示用户是否要删除
                const confirmResult = await this.$confirm(
                    '此操作将永久删除该文件, 是否继续?',
                    '提示', {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }
                ).catch(err => err)

                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除！')
                }

                const {
                    data: res
                } = await this.$http.delete(
                    `roles/${role.id}/rights/${rightId}`
                )

                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败！')
                }

                // this.getRolesList()
                role.children = res.data
            },
            // 展示分配权限的对话框
            async showSetRightDialog(role) {
                this.roleId = role.id
                // 获取所有权限的数据
                const {
                    data: res
                } = await this.$http.get('rights/tree')

                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限数据失败！')
                }

                // 把获取到的权限数据保存到 data 中
                this.rightslist = res.data
                console.log(this.rightslist)

                // 递归获取三级节点的Id
                this.getLeafKeys(role, this.defKeys)

                this.setRightDialogVisible = true
            },
            // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
            getLeafKeys(node, arr) {
                // 如果当前 node 节点不包含 children 属性，则是三级节点
                if (!node.children) {
                    return arr.push(node.id)
                }

                node.children.forEach(item => this.getLeafKeys(item, arr))
            },
            // 监听分配权限对话框的关闭事件
            setRightDialogClosed() {
                this.defKeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]

                const idStr = keys.join(',')

                const {
                    data: res
                } = await this.$http.post(
                    `roles/${this.roleId}/rights`, {
                        rids: idStr
                    }
                )

                if (res.meta.status !== 200) {
                    return this.$message.error('分配权限失败！')
                }

                this.$message.success('分配权限成功！')
                this.getRolesList()
                this.setRightDialogVisible = false
            }
        }
    }
</script>

<style lang="less" scoped>
    .el-tag {
        margin: 7px;
    }

    .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee;
    }

    .vcenter {
        display: flex;
        align-items: center;
    }
</style>